Just to set the cat amongst the pigeons, I, along with nearly all of my colleagues used to fly well over a hundred hours per month on a regular basis during the summer. This was positively encouraged by the Boss, along with little or no time off.......One summer not too long a go, I went three and a half months without a day off and on one of those months logged 120 hrs....
This as has been mentioned is not exactly ideal, however, as far as I'm aware there are no CAA rules against it as the CAA have had my logbook on several occasions and never raised it with me...